[010/119] md/raid5: make sure curr_sync_completes is uptodate when reshape starts

Greg KH
2009-12-07T00:35:51Z

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2.6.31-stable review patch. If anyone has any objections, please let us know.

------------------
From: NeilBrown <neilb@suse.de>

commit 8dee7211467a56b7eb4e4359efb0aa4a72e1b6f3 upstream.

This value is visible through sysfs and is used by mdadm
when it manages a reshape (backing up data that is about to be
rearranged). So it is important that it is always correct.
Current it does not get updated properly when a reshape
starts which can cause problems when assembling an array
that is in the middle of being reshaped.

This is suitable for 2.6.31.y stable kernels.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/md/raid5.c | 2 ++
1 file changed, 2 insertions(+)

--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -3790,6 +3790,8 @@ static sector_t reshape_request(mddev_t
sector_nr = conf->reshape_progress;
sector_div(sector_nr, new_data_disks);
if (sector_nr) {
+ mddev->curr_resync_completed = sector_nr;
+ sysfs_notify(&mddev->kobj, NULL, "sync_completed");
*skipped = 1;
return sector_nr;
}